2005 Saab 9-3 Owner's Manual - Page 179

Starting and driving If you stop the car with reverse gear engaged, the sound pulse will stop after 2 seconds. The sound pulses will return if you continue to reverse. If the car rolls forward while reverse is engaged, the system is silenced. When the distance to the object is less than 1 ft. (30 cm), a continuous tone will be heard. When an object is approximately 3 ft. (90 cm) from the car, the sound pulses change character markedly (frequency increases). A distance of about 3 ft. (90 cm) is suitable if you wish to load or unload the trunk. If the distance between an object and a corner sensor does not change for 3 seconds, for example if you are reversing alongside a wall, the system will switch to monitoring straight back. The system indicates if the distance to the wall decreases again. If a trailer is hitched up and correctly connected to the trailer contact by the tow bar, the system is automatically deactivated. 177 NOTICE The sensors must be kept clean to function well. Ice, snow and dirt can affect their sensitivity. Large quantities of snow or dirt covering the sensors can prevent the parking assistance system from detecting any objects. Do not spray the sensors with a pressure washer, as this can damage them. Reversing alongside a wall If the distance between an object and a corner sensor does not change for 2 seconds, for example if you are reversing alongside a wall, the system will switch to monitoring straight back. The system indicates if the distance to the wall decreases again. Cars with trailer hitch If the car has a trailer hitch and its wiring is correctly connected to the car's electrical system, the Saab Parking Assistance automatically compensates for the protrusion of the tow bar. If a camper or trailer is hitched up and the trailer hitch wiring is correctly connected to the car's electrics, the system is automatically deactivated. You can temporarily deactivate the Saab Parking Assistance as follows: • Engage reverse and press the CLEAR button on the SID control panel. The system will be reactivated the next time you engage reverse.